Results 11 to 20 of about 248,368 (367)

Origin and function of the yolk sac in primate embryogenesis

open access: yesNature Communications, 2020
Why do human embryos need a yolk sac and how does it form? This Perspective by Thorsten Boroviak and Connor Ross explores the development and function of the yolk sac in primate embryogenesis.
Connor Ross, Thorsten E. Boroviak
doaj   +2 more sources

Definitive Hematopoiesis in the Yolk Sac Emerges from Wnt-Responsive Hemogenic Endothelium Independently of Circulation and Arterial Identity [PDF]

open access: yesStem Cells, 2015
Adult-repopulating hematopoietic stem cells (HSCs) emerge in low numbers in the midgestation mouse embryo from a subset of arterial endothelium, through an endothelial-to-hematopoietic transition.
Conway, Simon J.   +4 more
core   +2 more sources

Morphology of the avian yolk sac [PDF]

open access: yesJournal of Morphology, 2020
AbstractThe avian yolk sac is a multifunctional extraembryonic organ that serves not only as a site of nutrient (yolk) absorption, but also for early hemopoiesis, and formation of blood vessels. Although the yolk sac membrane being specialized to function as an extraembryonic absorptive organ, it is neither morphologically nor functionally part of the ...
J. M. Starck
openaire   +3 more sources

Direct Effects of Microalgae and Protists on Herring (Clupea harengus) Yolk Sac Larvae.

open access: yesPLoS ONE, 2015
This study investigated effects of microalgae (Rhodomonas baltica) and heterotrophic protists (Oxyrrhis marina) on the daily growth, activity, condition and feeding success of Atlantic herring (Clupea harengus) larvae from hatch, through the end of the ...
Björn Illing   +3 more
doaj   +2 more sources

Yolk sac macrophage progenitors traffic to the embryo during defined stages of development

open access: yesNature Communications, 2018
Tissue-resident macrophages are derived from yolk sac progenitors but how and when these progenitors enter is unclear. Here the authors use fate mapping and intravital microscopy to track the movement of resident macrophage precursors from the yolk sac ...
C. Stremmel   +21 more
doaj   +2 more sources

ZBTB16: a novel sensitive and specific biomarker for yolk sac tumor [PDF]

open access: bronzeModern Pathology, 2016
Guang‐Qian Xiao   +6 more
openalex   +2 more sources

An ultrasonographic study to evaluate the correlation of calcified yolk sac with spontaneous abortion

open access: yesAsian Journal of Medical Sciences, 2022
Background: The yolk sac is a small, membranous structure, which is situated outside the embryo and has a variety of functions during embryonic development.
Geetanjali Srivastava   +5 more
doaj   +1 more source

Yolk sac development, function and role in rodent pregnancy

open access: yesBirth Defects Research, 2023
During the early phases of embryonic development, the yolk sac serves as an initial placenta in many animal species. While in some, this role subsides around the end of active organogenesis, it continues to have important functions in rodents, alongside ...
A. Ornoy, Richard K. Miller
semanticscholar   +1 more source

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